mirror of
https://git.FreeBSD.org/src.git
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486 lines
8.6 KiB
C
486 lines
8.6 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Edward Wang at The University of California, Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)ttzapple.c 8.1 (Berkeley) 6/6/93";
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static char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include "ww.h"
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#include "tt.h"
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#include "char.h"
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/*
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zz|zapple|perfect apple:\
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:am:pt:co#80:li#24:le=^H:nd=^F:up=^K:do=^J:\
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:ho=\E0:ll=\E1:cm=\E=%+ %+ :ch=\E<%+ :cv=\E>%+ :\
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:cl=\E4:ce=\E2:cd=\E3:rp=\E@%.%+ :\
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:so=\E+:se=\E-:\
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:dc=\Ec:DC=\EC%+ :ic=\Ei:IC=\EI%+ :\
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:al=\Ea:AL=\EA%+ :dl=\Ed:DL=\ED%+ :\
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:sf=\Ef:SF=\EF%+ :sr=\Er:SR=\ER%+ :cs=\E?%+ %+ :\
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:is=\E-\ET :
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*/
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#define NCOL 80
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#define NROW 24
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#define TOKEN_MAX 32
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extern short gen_frame[];
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/* for error correction */
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int zz_ecc;
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int zz_lastc;
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/* for checkpointing */
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int zz_sum;
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zz_setmodes(new)
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{
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if (new & WWM_REV) {
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if ((tt.tt_modes & WWM_REV) == 0)
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ttesc('+');
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} else
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if (tt.tt_modes & WWM_REV)
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ttesc('-');
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tt.tt_modes = new;
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}
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zz_insline(n)
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{
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if (n == 1)
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ttesc('a');
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else {
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ttesc('A');
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ttputc(n + ' ');
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}
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}
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zz_delline(n)
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{
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if (n == 1)
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ttesc('d');
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else {
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ttesc('D');
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ttputc(n + ' ');
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}
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}
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zz_putc(c)
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char c;
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{
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if (tt.tt_nmodes != tt.tt_modes)
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zz_setmodes(tt.tt_nmodes);
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ttputc(c);
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if (++tt.tt_col == NCOL)
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tt.tt_col = 0, tt.tt_row++;
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}
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zz_write(p, n)
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register char *p;
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register n;
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{
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if (tt.tt_nmodes != tt.tt_modes)
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zz_setmodes(tt.tt_nmodes);
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ttwrite(p, n);
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tt.tt_col += n;
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if (tt.tt_col == NCOL)
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tt.tt_col = 0, tt.tt_row++;
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}
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zz_move(row, col)
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register row, col;
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{
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register x;
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if (tt.tt_row == row) {
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same_row:
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if ((x = col - tt.tt_col) == 0)
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return;
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if (col == 0) {
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ttctrl('m');
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goto out;
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}
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switch (x) {
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case 2:
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ttctrl('f');
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case 1:
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ttctrl('f');
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goto out;
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case -2:
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ttctrl('h');
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case -1:
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ttctrl('h');
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goto out;
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}
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if ((col & 7) == 0 && x > 0 && x <= 16) {
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ttctrl('i');
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if (x > 8)
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ttctrl('i');
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goto out;
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}
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ttesc('<');
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ttputc(col + ' ');
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goto out;
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}
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if (tt.tt_col == col) {
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switch (row - tt.tt_row) {
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case 2:
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ttctrl('j');
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case 1:
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ttctrl('j');
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goto out;
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case -2:
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ttctrl('k');
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case -1:
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ttctrl('k');
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goto out;
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}
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if (col == 0) {
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if (row == 0)
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goto home;
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if (row == NROW - 1)
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goto ll;
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}
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ttesc('>');
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ttputc(row + ' ');
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goto out;
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}
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if (col == 0) {
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if (row == 0) {
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home:
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ttesc('0');
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goto out;
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}
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if (row == tt.tt_row + 1) {
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/*
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* Do newline first to match the sequence
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* for scroll down and return
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*/
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ttctrl('j');
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ttctrl('m');
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goto out;
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}
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if (row == NROW - 1) {
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ll:
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ttesc('1');
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goto out;
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}
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}
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/* favor local motion for better compression */
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if (row == tt.tt_row + 1) {
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ttctrl('j');
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goto same_row;
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}
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if (row == tt.tt_row - 1) {
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ttctrl('k');
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goto same_row;
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}
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ttesc('=');
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ttputc(' ' + row);
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ttputc(' ' + col);
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out:
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tt.tt_col = col;
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tt.tt_row = row;
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}
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zz_start()
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{
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ttesc('T');
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ttputc(TOKEN_MAX + ' ');
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ttesc('U');
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ttputc('!');
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zz_ecc = 1;
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zz_lastc = -1;
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ttesc('v');
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ttflush();
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zz_sum = 0;
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zz_setscroll(0, NROW - 1);
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zz_clear();
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zz_setmodes(0);
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}
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zz_reset()
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{
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zz_setscroll(0, NROW - 1);
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tt.tt_modes = WWM_REV;
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zz_setmodes(0);
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tt.tt_col = tt.tt_row = -10;
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}
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zz_end()
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{
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ttesc('T');
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ttputc(' ');
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ttesc('U');
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ttputc(' ');
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zz_ecc = 0;
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}
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zz_clreol()
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{
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ttesc('2');
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}
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zz_clreos()
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{
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ttesc('3');
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}
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zz_clear()
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{
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ttesc('4');
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tt.tt_col = tt.tt_row = 0;
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}
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zz_insspace(n)
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{
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if (n == 1)
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ttesc('i');
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else {
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ttesc('I');
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ttputc(n + ' ');
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}
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}
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zz_delchar(n)
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{
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if (n == 1)
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ttesc('c');
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else {
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ttesc('C');
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ttputc(n + ' ');
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}
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}
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zz_scroll_down(n)
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{
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if (n == 1)
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if (tt.tt_row == NROW - 1)
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ttctrl('j');
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else
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ttesc('f');
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else {
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ttesc('F');
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ttputc(n + ' ');
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}
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}
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zz_scroll_up(n)
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{
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if (n == 1)
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ttesc('r');
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else {
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ttesc('R');
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ttputc(n + ' ');
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}
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}
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zz_setscroll(top, bot)
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{
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ttesc('?');
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ttputc(top + ' ');
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ttputc(bot + ' ');
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tt.tt_scroll_top = top;
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tt.tt_scroll_bot = bot;
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}
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int zz_debug = 0;
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zz_set_token(t, s, n)
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char *s;
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{
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if (tt.tt_nmodes != tt.tt_modes)
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zz_setmodes(tt.tt_nmodes);
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if (zz_debug) {
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char buf[100];
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zz_setmodes(WWM_REV);
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(void) sprintf(buf, "%02x=", t);
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ttputs(buf);
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tt.tt_col += 3;
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}
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ttputc(0x80);
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ttputc(t + 1);
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s[n - 1] |= 0x80;
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ttwrite(s, n);
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s[n - 1] &= ~0x80;
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}
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/*ARGSUSED*/
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zz_put_token(t, s, n)
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char *s;
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{
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if (tt.tt_nmodes != tt.tt_modes)
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zz_setmodes(tt.tt_nmodes);
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if (zz_debug) {
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char buf[100];
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zz_setmodes(WWM_REV);
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(void) sprintf(buf, "%02x>", t);
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ttputs(buf);
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tt.tt_col += 3;
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}
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ttputc(t + 0x81);
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}
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zz_rint(p, n)
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char *p;
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{
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register i;
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register char *q;
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if (!zz_ecc)
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return n;
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for (i = n, q = p; --i >= 0;) {
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register c = (unsigned char) *p++;
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if (zz_lastc == 0) {
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switch (c) {
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case 0:
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*q++ = 0;
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zz_lastc = -1;
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break;
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case 1: /* start input ecc */
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zz_ecc = 2;
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zz_lastc = -1;
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wwnreadstat++;
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break;
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case 2: /* ack checkpoint */
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tt.tt_ack = 1;
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zz_lastc = -1;
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wwnreadack++;
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break;
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case 3: /* nack checkpoint */
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tt.tt_ack = -1;
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zz_lastc = -1;
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wwnreadnack++;
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break;
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default:
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zz_lastc = c;
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wwnreadec++;
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}
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} else if (zz_ecc == 1) {
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if (c)
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*q++ = c;
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else
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zz_lastc = 0;
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} else {
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if (zz_lastc < 0) {
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zz_lastc = c;
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} else if (zz_lastc == c) {
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*q++ = zz_lastc;
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zz_lastc = -1;
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} else {
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wwnreadec++;
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zz_lastc = c;
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}
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}
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}
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return q - (p - n);
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}
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zz_checksum(p, n)
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register char *p;
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register n;
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{
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while (--n >= 0) {
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register c = *p++ & 0x7f;
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c ^= zz_sum;
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zz_sum = c << 1 | c >> 11 & 1;
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}
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}
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zz_compress(flag)
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{
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if (flag)
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tt.tt_checksum = 0;
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else
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tt.tt_checksum = zz_checksum;
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}
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zz_checkpoint()
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{
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static char x[] = { ctrl('['), 'V', 0, 0 };
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zz_checksum(x, sizeof x);
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ttesc('V');
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ttputc(' ' + (zz_sum & 0x3f));
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ttputc(' ' + (zz_sum >> 6 & 0x3f));
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ttflush();
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zz_sum = 0;
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}
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tt_zapple()
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{
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tt.tt_insspace = zz_insspace;
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tt.tt_delchar = zz_delchar;
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tt.tt_insline = zz_insline;
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tt.tt_delline = zz_delline;
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tt.tt_clreol = zz_clreol;
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tt.tt_clreos = zz_clreos;
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tt.tt_scroll_down = zz_scroll_down;
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tt.tt_scroll_up = zz_scroll_up;
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tt.tt_setscroll = zz_setscroll;
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tt.tt_availmodes = WWM_REV;
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tt.tt_wrap = 1;
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tt.tt_retain = 0;
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tt.tt_ncol = NCOL;
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tt.tt_nrow = NROW;
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tt.tt_start = zz_start;
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tt.tt_reset = zz_reset;
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tt.tt_end = zz_end;
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tt.tt_write = zz_write;
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tt.tt_putc = zz_putc;
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tt.tt_move = zz_move;
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tt.tt_clear = zz_clear;
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tt.tt_setmodes = zz_setmodes;
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tt.tt_frame = gen_frame;
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tt.tt_padc = TT_PADC_NONE;
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tt.tt_ntoken = 127;
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tt.tt_set_token = zz_set_token;
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tt.tt_put_token = zz_put_token;
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tt.tt_token_min = 1;
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tt.tt_token_max = TOKEN_MAX;
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tt.tt_set_token_cost = 2;
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tt.tt_put_token_cost = 1;
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tt.tt_compress = zz_compress;
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tt.tt_checksum = zz_checksum;
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tt.tt_checkpoint = zz_checkpoint;
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tt.tt_reset = zz_reset;
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tt.tt_rint = zz_rint;
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return 0;
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}
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